MLA

Marinetti, F. T., 1876-1944. Diploma d'Onore conferred on Marinetti by “Universa Parnassia, Nova Arcadia Universitatis Petripauli.” [1935]. [7914-1]. box 100, slide 14. 1935. https://collections.library.yale.edu/catalog/10661571.

APA, 6th edition

Marinetti, F. T., 1876-1944. (["box 100, slide 14"])(1935)[Diploma d'Onore conferred on Marinetti by “Universa Parnassia, Nova Arcadia Universitatis Petripauli.” [1935]. [7914-1]]. https://collections.library.yale.edu/catalog/10661571.